Divergence. The figures below describe three different flow fields of a gas. In (A), (B), and (C), the velocity increases, decreases, and remains the same, respectively, as the distance from the origin increases. In each case, indicate whether the sign of the divergence of the velocity field v at any point in space is positive, negative, or zero, whether the flow is compressible or incompressible. Also, attempt to indicate under what circumstances a flow field like the one depicted in the figure may materialize